US 10,832,627 B2Granted

Display apparatus and source driver thereof and operating method

AssigneeNovatek Microelectronics Corp.

InventorsJhih-Siou Cheng, Yi-Chuan Liu

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Abstract

A display apparatus, a source driver of the display apparatus and an operating method of the source driver are provided. The display apparatus includes a display panel, at least one gate driver and a plurality of source drivers. The display panel includes a plurality of source lines and a plurality of gate lines. A plurality of output terminals of the gate driver are coupled to the gate lines in one-to-one manner. A plurality of output terminals of the source drivers are coupled to the source lines in one-to-one manner to provide a plurality of source driving voltages to the source lines. The source driving voltages include different coarse compensation voltages. The coarse compensation voltages are respectively configured based on distances between the source drivers which control the source lines and input terminals of the gate lines of the display panel.

Claims22

Dependent claims

A display apparatus, comprising:

a display panel, comprising a plurality of source lines and a plurality of gate lines, wherein each of the source lines is perpendicular to each of the gate lines;
at least one gate driver having a plurality of output terminals coupled to the gate lines;
and
a plurality of source drivers having a plurality of output terminals coupled to the source lines to provide a plurality of source driving voltages to the source lines, wherein the plurality of source driving voltages include first coarse compensation voltages assigned by a first source driver of the plurality of source drivers, and the source driving voltages include second coarse compensation voltages assigned by a second source driver of the plurality of source drivers,
wherein each of the first coarse compensation voltages assigned by the first source driver has the same first voltage value, each of the second coarse compensation voltages assigned by the second source driver has the same second voltage value, and the first coarse compensation voltages assigned by the first source driver are different from the second coarse compensation voltages assigned by the second source driver,
wherein the first coarse compensation voltages are respectively configured based on distances between the first source driver and input terminals of the gate lines so as to compensate for feed-through voltages induced by parasitic capacitances between the source lines controlled by the first source driver and the gate lines,
wherein the second coarse compensation voltages are respectively configured based on distances between the second source driver and input terminals of the gate lines so as to compensate for feed-through voltages induced by parasitic capacitances between the source lines controlled by the second source driver and the gate lines.

4 more elements

A source driver, configured to drive a plurality of source lines of a display panel, and comprising:

a programmable gamma generating circuit, configured to provide a plurality of gamma voltages;
and
a plurality of drive channel circuits, coupled to the programmable gamma generating circuit to receive the gamma voltages, wherein a plurality of output terminals of the drive channel circuits are coupled to the source lines to provide a plurality of compensated source driving voltages to the source lines, and the plurality of compensated source driving voltages include multiple coarse compensation voltages and multiple fine compensation voltages, wherein each of the coarse compensation voltages provided from different drive channel circuits has the same voltage value, and each of the fine compensation voltages provided from different drive channel circuits has a different voltage value,
wherein the fine compensation voltages are respectively configured based on distances between input terminals of a plurality of gate lines of the display panel and the source lines connecting to the source driver so as to compensate for feed-through voltages induced by parasitic capacitances between the source lines and the gate lines, wherein each of the source lines is perpendicular to each of the gate lines.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/209,778Filed 14 Jul 2016
Published: US 2018/0018928 A118 Jan 2018
Granted: 10 Nov 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G09G 3/3696
Control of matrices with row and column drivers: generation of voltages supplied to electrode drivers
G09G 3/2092
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 3/3659
Using an active matrix: the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g.…
G09G 3/3688
Details of drivers for data electrodes: suitable for active matrices only